import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

/* Layout */
import Layout from '@/layout'

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/guide/essentials/router-and-nav.html
 *
 * hidden: true                   if set true, item will not show in the sidebar(default is false)
 * alwaysShow: true               if set true, will always show the root menu
 *                                if not set alwaysShow, when item has more than one children route,
 *                                it will becomes nested mode, otherwise not show the root menu
 * redirect: noRedirect           if set noRedirect will no redirect in the breadcrumb
 * name:'router-name'             the name is used by <keep-alive> (must set!!!)
 * meta : {
 roles: ['admin','editor']    control the page roles (you can set multiple roles)
 title: 'title'               the name show in sidebar and breadcrumb (recommend set)
 icon: 'svg-name'/'el-icon-x' the icon show in the sidebar
 breadcrumb: false            if set false, the item will hidden in breadcrumb(default is true)
 activeMenu: '/example/list'  if set path, the sidebar will highlight the path you set
 }
 */

/**
 * constantRoutes
 * a base page that does not have permission requirements
 * all roles can be accessed
 */
export const constantRoutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/404',
    component: () => import('@/views/404'),
    hidden: true
  },

  {
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    children: [{
      path: 'dashboard',
      name: '控制台',
      component: () => import('@/views/dashboard/index'),
      meta: { title: '控制台', icon: 'ti ti-device-imac-dollar' }
    }]
  },
  {
    path: '/product',
    component: Layout,
    children: [
      {
        path: 'list',
        name: '产品管理',
        component: () => import('@/views/product/list'),
        meta: { title: '产品管理', icon: 'ti ti-package'}
      },
      {
        path: 'detail',
        name: '产品详情',
        component: () => import('@/views/product/detail.vue'),
        meta: {
          title: '产品详情',
          activeMenu: '/product/list',
          breadcrumb: [
            { title: '产品列表', path: '/product/list' },
            { title: '产品详情' }
          ]
        },
        hidden: true
      },
    ]
  },
  {
    path: '/varient',
    component: Layout,
    children: [
      {
        path: 'varientList',
        name: '变体管理',
        component: () => import('@/views/varient/varientList'),
        meta: { title: '变体管理', icon: 'ti ti-adjustments'}
      },
    ]
  },
  {
    path: '/template',
    component: Layout,
    children: [
      {
        path: 'templateList',
        name: '模板管理',
        component: () => import('@/views/template/templateList'),
        meta: { title: '模板管理', icon: 'ti ti-file-text'}
      },
      {
        path: 'templateDetail',
        name: '模板详情',
        component: () => import('@/views/template/templateDetail.vue'),
        meta: {
          title: '模板详情',
          activeMenu: '/template/templateList',
          breadcrumb: [
            { title: '模板列表', path: '/template/templateList' },
            { title: '模板详情' }
          ]
        },
        hidden: true
      },
    ]
  },
  {
    path: '/collection',
    component: Layout,
    children: [
      {
        path: 'collectionList',
        name: '集合管理',
        component: () => import('@/views/collection/collectionList'),
        meta: { title: '集合管理', icon: 'ti ti-folders'}
      },
      {
        path: 'collectionDetail',
        name: '产品详情',
        component: () => import('@/views/collection/collectionDetail.vue'),
        meta: {
          title: '产品详情',
          activeMenu: '/collection/collectionList',
          breadcrumb: [
            { title: '集合列表', path: '/collection/collectionList' },
            { title: '产品详情' }
          ]
        },
        hidden: true
      },
    ]
  },


  // {
  //   path: 'external-link',
  //   component: Layout,
  //   children: [
  //     {
  //       path: 'https://panjiachen.github.io/vue-element-admin-site/#/',
  //       meta: { title: 'External Link', icon: 'ti ti-mood-tongue-wink' }
  //     }
  //   ]
  // },

  // 404 page must be placed at the end !!!
  { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  // mode: 'history', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
})

const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}


function hasPermission(to, role) {
  // 逐级检查 matched 的每个路由记录是否声明了 roles
  return !to.matched.some(record => {
    const roles = record.meta && record.meta.roles
    // 只要某一级声明了 roles 且不包含当前 role，就认为无权限
    return roles && !roles.includes(Number(role))
  })
}

router.beforeEach((to, from, next) => {
  const isLoggedIn = localStorage.getItem('token')
  const role = Vue.prototype.getRoleType()

  if (!isLoggedIn) {
    return to.path === '/login' ? next() : next('/login')
  }

  // 角色权限校验（依赖 meta.roles）
  if (!hasPermission(to, role)) {
    return next('/404')
  }

  next()
})

export default router
